"Mejor te vas" and other "you better" phrases

Question

Como yo entiendo, "mejor te vas" es "you better go." Se puede usar "mejor + verbo en presente" como "you better..."  lo que sea?" Tal como "mejor comes ya" o "mejor vienes pronto." Sé que podría decir "deberías comer ya" o "come rápido!" para expresar "you should eat now" y "eat quickly!" pero "you better eat now" y "you better come soon" son distintas en el tono. Y también el contexto es importante. Así la pregunta. ¡Gracias!

Accepted Answer

Hola Christian
Interesante...
There are different ways to make suggestions in Spanish, starting with "deberías..." as you said; this one using "Mejor..." is more colloquial. To match the English "You better [do something]" we have:
Mejor + present tense indicative : Mejor te vas, Mejor salimos ahora, Mejor pagamos a medias... 
The context for this is pretty much the same as when we use "deberías..., deberíamos..." but definitely more colloquial. It would go with the tone you use as you say, for example, you could use this changing your tone and sounding more "worried" so this would imply being in a more "urgent/emergency" situation, or if you say it when you're cross with someone, this would sound more like an order, instead of a light suggestion. 
Bear in mind that you may also find, with the same nuance:
Será mejor que + present subjunctive

Será mejor que pidas permiso a tu padre. 
You better ask your dad for permission.
Será mejor que busquemos un techo. Va a empezar a llover.
We better find a roof. It's going to start raining.

I hope this helped.
Saludos
Inma

Answer

Hey Inma, thank you so much! That definitely answered my question and much more besides. I really like understanding the nuances within the language, so this is perfect! Adding this to my study material so I can master it. All the grammar lessons you and the others do here are so helpful!    ¡Mil gracias!